WHAT DOES HWGACOR RTP MEAN?

Presented a spherical raindrop, and defining the perceived angle on the rainbow as 2φ, as well as angle of the internal reflection as 2β, then the angle of incidence in the Sunshine's rays with regard to the drop's surface standard is 2β − φ. For the reason that angle of refraction is β, Snell's regulation presents us대머리수리는 왕ë¶